Exhaust fan



J. MIHALY EXHAUST FAN July 23, 1929.

Filed March 17, 1927 animate; J 05EPH MJHAL Y. 351 mm Guam;

c Em A i fiwif h a i H T 4 E E U I m mama x Patented July 23, 1929.

UNITED STATES PATENT OFFICE.

JOSEPH MIHALY, on NEW Yomgn. Y., ASSIGNOR T MICHAEL none, on NEW YORK, n. Y.

EXHAUST FAN.

Application filed March 17, 1927.

This invention relates to improvements in exhaust fans and has for its object to provide a device of this character which will maintain draft currents through two separate pipe elements, but discharge through a single outlet.

A further object is the provision of means for adjusting the intake pipes independently in varied positions with respect to the vertical axis of the fan casing.

These and other objects and features of the invention will be fully described in the following specification and illustrated in the accompanying drawings, in which Fig. 1 shows a rear view of the fan mounted on the frame of a buffing machine.

Fig. 2 shows a side view of same.

Fig. 3 shows an enlarged side view of the fan casing with a portion of an intake pipe thereto attached.

Fig. 4 shows a section on the line 44 of Figure 3.

Fig. 5 shows the central dividing plate removed from the casing.

Fig. 6 shows a side View of a supporting bracket with fragment of the casing attached.

Fig. 7 shows a curved vertical section on the line 77 of Figure 6.

Fig. 8 shows a sectional top view on the line 88 of Figure 7.

Fig. 9 shows another form of supporting bracket secured to the exhaust nozzle.

Referring to Figure 1 of the drawings; the device comprises right and left casing elements 10 and 11 which are shown secured to the frame of a bufling machine 12 which is seen. in faint outline. The device may, however, be mounted in any suitable manner in connection with. machines of any type; or for any other purposes where its especial features are required.

Secured to the sides of the casing elements are intake pipes 13 and 14 terminating in the receiver hoods 15 and 16. The exhaust nozzle 17 may be connected to any desired form of pipe line, or waste receptacle. The apparatus is driven by means of the pulley 18 which is attached to the shaft 19 which is supported in the bearings 20 and 21.

Butfing wheels are shown for purposes of description in connection with the invention proper. They may be seen in faint outline at 22 and 23 under the receiving hoods 15 and 16.

Serial No. 176,049.

Now referring to Figure 4 of the drawin gs; it will be seen that the shaft 19 extends cent rally through the casing, additional bearings being provided at 23 and 29 in the angles of the intake pipes. Guide collars 30 and 31 beingaflixed adjacent to the said bearings. Mounted on this shaft are two sets of fan blades as seen at 32 and 33 which are secured to the spider elements 34 and 35, these being affixed to the said shaft. A dividing plate 36 separates the two sides of the. fan casing, being secured in position by clamping between the flanges 37 and 38 of the casing elements 10 and 11. Nuts and bolts as seen at 39 being used for this purpose.

It will now be seen that when the fans are in motion; separate air currents are maintained through the intake pipes 13 and 14 as indicated by the arrows 41 and 42, and that these currents, being drawn through the casing, are driven out through the common exhaust nozzle 17.

A novel form of attachment of the intake pipes is illustrated in Figure 3, whereby they may be independently swung in any desired position relative to the casing elements by means of flanges as that shown at 43 which rest against bosses on the casing elements as seen at 44, being slidably secured by cap screws as shown at 45, 46 etc., which pass through the slots 47 and 48 and engage the aforesaid bosses.

Any suitable means of support may be used in connection with the casing elements, but those shown in Figures 6 and 9 are especially applicable.

The form of bracket illustrated in Figures 6, 7 and 8 comprises two angle plates 50 and 51 having side elements curved as seen at 52. These are bolted on to the casing flanges as seen at 53. The bases may be secured to any suitable frame structure by bolts through the slots as seen at 54, 55 etc.

The bracket shown at 56 in Figure 9 is similar to that above described except that it is designed to fit on to the casing at the base of the nozzle element.

The device is shown with fan blades of a specific type; but other forms of these elements may be used within the casing, if desired.

Vhile I have shown the device in its preferred form, I do not wish to be held rigidly to the exact construction a :illi'istrated in detail, but claim the right to such minor modifications as may come Within the scope of the appended claim.

Having thus described my invention, What I claim as new and desire to secure by Letters Patent, is as follows:

In an apparatus of the class described, a 'asing comprising right and left flanged elements secured together by the suitable joining of the said flanges, a dividing; plate secured between. the said flanges and separating the said casing into two compartments, a shaft supported transversely within the said casing, and draft producing elements secured to the said shaft and located Within the said compartments, a suitable discharge nozzle on the said casing and means for the support of the whole in operative position, and in combination With the elements above described, concentrically adjustable intake pipes secured to the said casing by means of flange members having curved slots therein and set bolts passing through the same and engaging the Walls of the said casing, and the said intake pipes further supported by hearing elements resting on intermediate portions of the said shaft, substantially as shown and described herewith.

Signed at New York, in the'county of New York and State of New York this 3rd day of January, A. D. 1927.

JOSEPH MIHALY. 

